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?