by br March 05, 2015
finnegan o brien (otherwise known as the notorious bigboyfinn) is the definition of a plank mf, saw him irl and I was like damn hes one mfing plank.
by hannanaonana June 23, 2021
Someone who is a bit if an idiot most of the time. Does things without thinking and lacks common sense.
by RussianM0b February 24, 2021
by YaMuddaMan October 27, 2022