It refers to Darren Criss, who plays a gay man on television and when interviewing in real life he ALWAYS makes a point to say that he is straight and point out his heterosexuality. therefore Crissing is an insistent declaration of one's heterosexuality
an extremely large woman, commonly mistaked for a whale or large animal. national geographic made a magazine about this large creature but didnt have a camera lense wide enough to capture its enormous bod.
bro: damn bruh do you see that thing ?, i think its an amber crissinger..
bruh: yeah bro ! its wider than my cock !
When you and your friends get drunk on a hill, Chris will make it his duty to get some. Unfortunately, this usually involves; forceful kissing, temporary insanity, and last but not least, wearing a horse mask.
Fin: "Bro, did you see how Chris was Chrissing Sophie last night on leckhampton hill?"
Taegue "Yeah dude, he's fucking insane"
Chris: "Damn, i'm a big ol' nibba"