knob hopper 

1.A person,that gets alot of,dick.
2.A slut.
3.Always sucking,dick.
4.A person,that hops,from knob,to knob.

Your mother is a knob hopper.

knob hopper by Bob deez nuts October 7, 2007

knobchopper 

a toilet seat that really annoyingly wont stay up when you are urinating, you can try to use on ehand to hold it but this can be messy, otherwise it will fall on you

person: i was in the toilet but it was a frickin knobchopper
friend:ouch

knobchopper by daibheaid October 16, 2005