To behave in a silly, childish, or irresponsible way.
To work with something in a non-serious manner; to tweak or tinker.
To engage in sexual practices outside of marriage.
To complain or argue in a trivial or petty manner.
To contest, especially some trivial issue in a petty manner.
An objection or argument based on an ambiguity of wording or similar trivial circumstance; a minor complaint.