When your having sex, its the best bit, you know the bit at the end when you blow your beans, qv, or chuck your muck, qv.
In fact its the whole point of the excercise
I stuck my knob is, wiggled it about a bit, tipped my dirt, and then rolled over and went to kip
When a person has a log of stool in their anal cavity and another person shoves their penis into the anus. When pulling their penis out the stool is then stick to the tip of the penis giving them a dirty spear tip
"Fuck man! Danica gave me a dirty spear tip last night when I tried surprise butt sex with her"
Referring to the moment when a man is having vaginal intercourses with a woman and he accidently wrong holes her and when upon his penis is removed there is found to be any amount of fecal matter on the head.
I have to go get tested for an std because last night I got a dirty tip.
To take something small, that doesn't quite qualify as a theft. Probably from the Danish "skæv" or the Dutch "scheef", both of which are pronounced similarly, meaning "askew, or not quite right'. To change an item's ownership without permission, but only something small and of little worth.
"I skeefed an apple off the neighbor's tree." "I skeefed some chips outta your bag when you looked away." "Don't skeef my chair when I go to the bathroom."