Irish Slang - General Slang Slang Terms, Expressions, & Irish Spoken Language - Irish Phrases
Very Little threshold
Having a very poor tolerance level. The word threshold is the part of the door frame that you step over. In times gone by it was the peice of wood that went accross the doorway to stop the straw or hay (thresh) from spilling out of the house, long before carpets were used. Hence the word 'threshold'