n. & v.
n. 1 a short sharp sound as made by a horn, trumpet, or whistle. 2 US sl. cocaine or a snort (see SNORT n. 4) of cocaine.
v. 1 tr. sound (a horn etc.) with a short sharp sound. 2 intr. give out such a sound. tooter n.
[ prob. f. MLG tuten, or imit. ]