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1 definition by no one in particular really

gay looking male (usually briefs) underwear, often containing pastel colors, obnoxious patterns, or rainbow stripes.

Cross between 'gay' and 'underwear'
1) I'd like to return this as I thought there would be 3 pairs of simple, solid color briefs, but I was shocked to find this pastel striped gunder hidden between the two pairs on the outside.

2) Man: Lemme flip the lights before we go any further.

Woman: why? are you wearing gunders?
by no one in particular really August 09, 2009