sideshtupping 

To make the sexy time with a person other than one's primary partner.

Young man: i've been dating a pretty nice girl for a few months now.

Friend: have you been doing any sideshtupping, or is this one serious?

sideshtupping by sk8pss January 8, 2011

sidestepping 

sidestepping is a car racing term. This term only applies to cars with manual transmissions. The slightest edge of the left foot will be on the clutch and the clutch pedal will be all the way down to the floor, so when the car is ready to launch from standstill, the driver will simply move his toe and pop the clutch.

did u see how fast he took off the line?
he must of been sidestepping.

sidestepping by aaton January 27, 2008

Sidestepping 

When a beautiful female ignores all the calls and texts she gets, she isn’t depressed just doesn’t give a fuck!

“Every time I hit her up she sidesteps me”
“Bro, she’s sidestepping”

Sidestepping by Squid dwarf July 5, 2019

sidestepping 

when memembers of the female sex take off their shirts and walk sideways for a line of boys while standing at an arch. This usually turns into a competion. the male memembers decide who does it the best. BIG MISTAKE.

To win his effection, I particpated in a sidestepping competion.

sidestepping by I know anything and everything January 2, 2006