Sidebro 

A bro who is not really part of your main group of bros, but is chill enough with some of your bros that he can occasionally hang out with your main group of bros.

Hey guys, lets hang out tonight. You can invite any of the sidebros if you want.

Sidebro by drebay19 August 28, 2016

sidebro 

if your a woman, and have a boyfriend and are talking to another guy behind your boyfriends back. you are his side chick, he is your side bro.

jack is my sidebro but ronald doesn't know!

sidebro by madethisup July 13, 2015

sideboss

The pleasuring of a man's penis using your butthole, aka sitting on a penis.

dude 1: Hey did you see that guys crank?
dude 2: Yeah, I totally wanted to jump off my Busa and sideboss him

sideboss by gootboxybox July 7, 2014

sideboob

A view of the female breast seen from a side; generally under loosely-fitting clothes. Very titillating (pun intended) and sexual without showing any overt nudity.

There is so much sideboob at Los Angeles awards shows!

My brother's g/f's sideboob totally distracted me from my own g/f.

sideboob by Nutty J September 17, 2005

Sidebreast 

The worst form of a sideman. Can be used for males and females.

Shows moistness, and overall the worst sideman behaviour. Usually leaves friends 'hanging'

"man, do you lift?"
"Yeah, I lift...my legs when I walk"
Sidebreast.

"wna come 2 the cinema 2day?"
"Nah, gotta expand my knowledge on land economy."
Sidebreast.

"spud me"
"..........nah"
Sidebreast.

Sidebreast by l337n3s5 March 11, 2013

sideblowin 

Lifting one leg to fart

Everytime I see that fool lift one leg, I know he's sideblowin again.

sideblowin by dalycitybadgirl August 15, 2015

Siderodromophilia 

Sexual arousal from riding in trains.

See paraphilia.

Siderodromophilia is a bizarre sexual practice.

Siderodromophilia by Mistercity August 6, 2006