(n); A combination of the words - thigh, and arm; term used to describe a woman's/man's upper arm that is very fat - looking very much like a "thigh".
Often, the fat rolls out from underneath the person's shirt sleeve.
Oh my goodness, look at that fat lady's tharms!
by Nick Morrison August 15, 2004
When the loose upper arm is pushed up against your rib cage making your arm look as wide as your thigh. More prevalent amongst women in posed profile pictures.
Holy shit look at the size of her tharms. She looks like a linebacker.
by The CW Crew June 25, 2010

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