I. adjective
or swing·ing -njiŋ, -jēŋ
Etymology: from present participle of swinge (I)
chiefly Britain : superlative in size, amount, or character : very large or good : whopping , capital
the swingeing penalty … though dropped to half to secure payment, stopped the trade for a time — John Craig
Parliament asserted its “Loyal Devotion to his Royal Person” in swingeing terms — Nicholas Monsarrat
II. adverb
or swinging “
chiefly Britain : to a swingeing degree : superlatively , very
we reckon the time's coming when we'll want it swingeing bad — P.L.Ford