As in, "I don't play sports, but I am an athletic supporter." See also Sophomoric.
Kind sir, might you lend a hand and add a funny phrase?
According to dictionary.com, "to move restlessly or aimlessly from one place to another."
French for "staircase wit", this phrase describes thinking of a clever comeback when it is too late. See also French.
E.g., "Hey, you didn't bring any napkins witcha ditcha?" See also Redneck.