The term 'spend lavishly' can be summarized by three crossword solutions: SPLURGE (7 letters), BLOW (4 letters), and gototown (8 letters). SPLURGE is a verb meaning to spend money freely and extravagantly, while BLOW is a verb meaning to spend money quickly and carelessly. Gototown is an informal phrase meaning to spend money in a lavish manner. All three terms refer to spending money without restraint or caution.