To insert ones fist into a females vagina, like fisting but used as a term on porno sets to tell the difference between a fist in the vagina or a fist in the anal region.
Do you want me to get fristy on her this go around?
Getting frisky with a girl when all of a sudden she tries to give you a hand job with her wrists, becoming an immediate turn off
Rob: Dude, did you hear about Joe and Gina the other night?!
Dude: No, why? What happened man?
Rob: Gina totally got all fristy with him!
Dude: No way, that sucks he didn't get any.
Dude: He didn't...
Rob: He gave her a cum bracelet
To make an obnoxious yet smartass comment while under influence to a group of honeys on their way to hit the clubs.
Josh : hey ladies can i get a wristy ?
Girls : WHAT
Josh : i said got change for a fifty ?
Sammo: ahhahahahhahahahhahahahahahahahhaahhha nice fristy asshole