To stuff something into something anyway even though it doesn't quite fit. [Cf. Procrustes, procrustean. http://www.entrenet.com/~groedmed/greekm/mythproc.html] The word has even more meaning when lubrication would normally be used but was forgone. Example: I watched as Billy tried to shunk the puzzle piece into the puzzle.
SHUNK
Meaning of SHUNK in English
Slang English vocab. Английский сленговый словарь. 2012