1) A vehicle which carries firemen and fire fighting equipment to the scenes of fires.
2) A substitute for the word "Fuck", which has risen from a (false) rumor that Soupy Sales said on his kids show "What starts with F and ends with UCK?" Firetruck!
1) The firetruck went to the burninghouse.
2) Go firetruck yourself.
Becoming so intoxicated as to lose control of one's bladder whilst passed out. As far as I can determine, the term orginated in, and is mainly used in, Oceania.
When gingers (redheaded people) hookup (have sex). Primarily used by people with a ginger fetish. Additionally, the more gingers there are, the higher "alarm" fire it is.
Don't bother hitting on him. That ginger dude is only into firetrucking. If you're curious though, he uploaded a video on Tumblr of himself in a 4-alarm fire. It's HOT.