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6.
Something that hurts you but you like it anyways.
"Anal is such a Tom"

by Katrin Princess June 20, 2006
 
1.
the smallest particle of matter, contains protons, neutrons, and electrons. The protons and neutrons are contained in the nucleus while the electrons revolve around the nucleus at immense speeds
the only real definition on this page
by CorrodedBeing December 18, 2004
 
2.
Ass To Other girls Mouth.
The act of fucking a girl in the ass (hard) and then putting your shitty member into another girls mouth waiting nearby.
Christoph, what did you think when you gave Mareike the old a.t.o.m.? She didn't seem to like it.
by Andi Putlitz December 03, 2004
 
3.
Attracted To Older Men Syndrome
young woman: wow! that guys HOT!

friend: ? hes like 50

young woman: yah i guess i just have ATOMS
by kevin dampman January 18, 2011
 
4.
The act of having anal sex then immediately having/giving a blowjob. Going ass to mouth. Also known as the "rusty nail"
I went A to M on that bitch last night.
by M. Marlene August 28, 2007
 
5.
Attracted To Older Men Syndrome
Young Girl 1: Whoa! Look at that guy over there. He's hot!
Young Girl 2: Dude, he's like 37.
Young Girl 1: Sorry, I have ATOMS.
by Laura42395 January 18, 2011
 
7.
Ass to OTHER mouth
Similar to regular ass to mouth ATM, although this would be normal under orgy situations, ATOM or A.T.O.M. refers to fucking the first girl in the ass then hooking up with a different girl a short time after and receiving a blowjob first.
by theBeazy November 27, 2013