When you're trying to walk passed someone in the street and you manoeuvre into their peripheral-vision so as to make them feel uncomfortable and move out of the way.
When in London and the pavement is crowded (and the person in front is slow - with nowhere to overtake), you "elk" (or make the "elking" movement) into someones side-view so they slow down, move out of your way, and let you past (usually without them realising the magic ninja skills you have displayed).
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An estimate of a percentage (like "guestimate").
Lou is not sure of how many apples are in her fruit basket - but it looks about half-half... therefore the percentish is 50%~ The mathematical symbol looks like % (percent)but using a tild on its diagonal: o~o, shorthand %~ ("Percent-ish").
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