Sideship 

A romantic relationship with someone other than your partner or spouse at the same time

My relationship with Sean started as a sideship when I was still with Daniel

Sideship by Bruiser121 March 3, 2019

Sideswipe 

The fast autobot with wheels, and also wreckless.

Sideswipe: I’m gonna slice a con to half!!

Sideswipe by Skylynx June 16, 2021

sideswipe 

A maneuver that hides a public boner quite effectively. How it is done is to go either side of your crotch with your hand and "swipe" your hand to the opposite side of your crotch and hit your boner. This will cause the boner to go at a vertical position. The key is to have your pants catch your boner at the vertical position.

This technique works pretty much flawlessly when mastered. An expert can even hide a boner without a shirt by using boxers to catch the boner. Trick is to have the underwear go lower than your pants and wear the pants at a good height to cover the vertical boner. You still won't be able to hide the bulge created, but that is awesome to have.

WARNING: Raging public boners still go slightly outward and may still be visible if the force of the restraint is not strong enough to keep the boner back.

Jesse: "That chick was amazing! How did you not get a boner from that?"
Jon: "You kidding me? Of course I had a boner, but I effectively sideswiped it away like magic."
Jesse: "You are a fucking boss."

sideswipe by neranfafu July 8, 2012

Rocket League Sideswipe

A pretty decent mobile game. Sideswipe is essentially a simplified version of Rocket League and is probably the only decent thing Psyonix has done since the addition of Supersonic Legend to the RL competitive rank structure. Rocket League Sideswipe was released to the European and North American regions for download not long after the commencement of Season 5 and is probably the only thing Psyonix could have possibly done to redeem themselves after the S4 rewards catastrophe aside from an official announcement regarding a move to Unreal Engine 5.

Also referred to as “Pocket League” by thousands of 12-year-olds who all probably think they’re the first to say it.

“Bro, have you played Rocket League Sideswipe?”

“Yeah man, it’s pretty dope. Feels good to finally be able to air dribble.”

Rocket League Sideswipe by white_brownie December 4, 2021

california sideswipe

Pushing a girl's panties to the side in order to facilitate cunninglingus and/or penetration.

There was no time to take her panties off, so I pulled a California Sideswipe

california sideswipe by Mature mario November 17, 2016

Sideslip 

A leisurely form of sexual penetration in which the male is lying on his side behind the female, and inserts from up and under. Best enjoyed in the morning hours, when the girl is not yet awake enough to object to this impersonal form of coitus, one that becomes very personal by its grand finale.

n. the sideslip, I gave her the sideslip
v. to sideslip, sideslippin on 4, 4s, she got sideslipped last night

Ronald: "Hey Billy, what'd you do with Sally after the bar?"
Billy: "Well Ronald, we went back to my place and I eskimo'd her down the stairs. But then this morning, once I put my pocket-t back on, I gave that bitch the sideslip. She met the business end of my d!$%"

Sideslip by Professor JLB April 1, 2008

Sideswiper 

Applicable to a friend/acquaintance hitting on your girlfriend behind your back.

I was sent overseas by the army then I found out this guy is sideswiping my girl back home. What a sideswiper!

Sideswiper by chuggchuggriff August 3, 2011