/ sʌdz; NAmE / (also soap·suds ) noun
1.
[ pl. ] a mass of very small bubbles that forms on top of water that has soap in it
SYN lather :
She was up to her elbows in suds.
2.
[ U ] ( old-fashioned , NAmE , informal ) beer
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WORD ORIGIN
mid 19th cent.: of uncertain sense development but perhaps originally denoting the flood water of the fens; compare with Middle Low German sudde , Middle Dutch sudse marsh, bog; probably related to seethe .