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4.
A sexual relation of dubious standing or a concealed intimate relationship.
"This is Bridget, my...um, friend."
by Zak May 03, 2003
 
1.
Noun used to describe someone who you are banging, in the stage before she is your legitimate girlfriend
"Oh Hi guys, I hope you don't mind that I brought my um...friend Ursula to our poker night"
by Stan July 27, 2004
 
2.
A partner in a sexual relationship on an ambiguous standing.
"This is Kate, my, um, friend."
by lysol sammitch May 01, 2005
 
3.
a person with whom you are in a physical, but not necessarily romantic, relationship

also uhm-friend, uhmfriend, um-friend
"Oh...Hi mom, this is Steve my um...friend"
by mr.tickles July 25, 2005
 
5.
A member of the opposite sex who you are interested in and have been doing things with, but haven't made a move on. When introduced in public, you tend to say, "This is my um, friend ..."
"This is Jill, my ... um, friend."
by Stud April 11, 2005
 
6.
a euphemism for 'fuckbuddy'
only pussies say umfriend
girl: this is my umfriend Jake
by jolee February 17, 2009