(Aus.) to surrender, to give in.
|Digger Dialects 38: peek (vb.) — Give in; yield.|
|‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xxxviii 10/1: peak: To give up for finishing anything.|
|Ridgey-Didge Oz Jack Lang 39: Peak Concede defeat.|
|Dict. of Kiwi Sl. 124/1: will you peek? are you giving up? Probably from the question asked in card games involving trumping.|
|Reed Dict. of N.Z. Sl. [as cit. 1988].|
SE in slang uses
(US black) to appraise someone sexually.
|Way Past Cool 82: Lisa Thompson in fifth period all the time peekin you out, man!|