1)The exact opposite of a Queerag bag(See Queerag bag).Often used in context with a straight male who does NOT exibit homosexual activity.
2)A straight man's scrotum.
1)A Straight sack is everything NOT found in a Queerag bag.
2)Hugh Hefner has a Straight sack.
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The art of drinking goon(white wine) straight from the sack/cask, instead of behaving like a civilised human and drinking it from a cup.
"She was so drunk, she started skulling straight from the sack!"