meaning, somebody or something really grates on you/ is unbelievabley annoying, comes from the area of suffolk in the united kingdom, originates from candlestick makers when dirt used to stick onto the wick on the candle when being handled.
'oh this can'

'i know those beans really gets on my wick'
by mr.renfrew April 13, 2010
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“he gets on my wick”, means “he annoys me intensely
These Irish boys are brilliant. "Shining Light" gets on my wick though....
by Sevi December 7, 2006
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