Combination of the terms yo, as a greeting, and mofo, in one word. Not necessarily an insult, often used as a greeting to a long term friend similarly to nigga, though it can be a weak insult when applied to a stranger or enemy.
the act of falling into a puddle of mud while wearing a fancy gown or tuxedo of sorts and getting dirt on your shoes mostly...but some on your face also. tends to happen to white people.
Suzy: Did you see Johnny yooboobally last night? Homeboy was straight trippin' Haley: haha. he is a fool. righttttt.
The act of sneaking up behind an amish horse and carriage, taking a baseball bat, and hitting the back of the carriage. The swing will strike the driver and passengers in the back of the head.