look up any word, like swag:
on, to mean the time when our female counterparts become a ferocious member of the animal kingdom. It usually results in the male being unable to do anything correct, and being told so in a blunt and harsh manner.
Woman: Would u clean them damn plates.
Man: It ok, shes just on
by Mark D June 14, 2004
13 20
to be high or drunk
basically under the influence
DAMN i was on, no wonder i slept with the bitch!
by G-Ci April 12, 2009
170 62
to be gone off a pill or drunk, high, leanin, of sum sort or all of thee above
bruh im on like shyt!

im onnnn bruh!
by stix1015 May 23, 2009
60 30
To hold, or possess drugs that you are willing to sell.
"Are you on?"
"Is Sampson on?"
"I'm on at the moment"
by Diego June 23, 2003
105 82
1) Preposition; Above and touching a surface.
2) Adverb; Working, conducting their intended task.
3) Prefix; Continuously, continuing.
4) Slang Verb; To be menstruating.
1) I was on your mother all night.
2) Your computer is currently on.
3) The project is ongoing.
WOMAN: "I'm on at the minute. Fucking men, they're all bastards..."
by Stuart Fletcher January 18, 2005
64 49
1. To engage in certain conduct, behavior, activity with a conviction of progress, success, or moving forward.

2. An Affirmation of becoming.
1. I'm going to get my groove on tonight.

2. I want to get my learn on, so I'm going to college.

3. I'm about to get my grown man on because I'm becoming a daddy.
by Spnish Shaft March 08, 2008
29 24
Another way to say a girl is on her period. I dislike the word period. I dislike the word menstration. And guys do too. So...just say, "She's on".
What's wrong with her?
She's on.
by Ms. Funty January 24, 2008
26 23
old nymphomaniac
hey, Joe the girl you were with last night is an "O. N."
by tbone1956 June 29, 2011
0 4