(verb)
to prepare meat using some fat, such as to cover/smear it with something to prevent it from drying out in storage, or to stuff it with strips of fat before cooking;
e.g. He followed the instructions to lard and season the meat.
(verb)
to fill something with elements that are excessive and/or unnecessary, especially to do this to a piece of communication (writing or speech) by employing too many technical expressions;
e.g. Don't be tempted to lard your presentation with too many technical terms that will make it difficult to understand.