A way of saying to the person to get out of your way, also used if this person gets ahead of you in a game, or has killed you/scored against you just done something to their advantage/gain, The phrase "On Your Bicycle" is Used alot by The Scottish Lad Blarot!
by Blarot May 17, 2009
Derogatory phrase referring to a woman you would be embarrassed to be seen with. As in, you want to ride it but you don't want your friends to see you on it.
Guy:I'd like to have sex with that voluptuous lady over there but my friends only think skinny chicks are hot.
Friend: Yah, she's your sister's bicycle.
Friend: Yah, she's your sister's bicycle.
by GaeaKali November 30, 2014