A bull is, as you may know, the male of a cow and it is also a male elephant or moose. In religion, a bull is a document issued by the pope. Unrelatedly, and as a slang term, bull is a synonym for ‘lies’ or ‘exaggerations’ and, in US English, if you bull someone, it means that you try to impress them by telling lies…
A slot is a thin and narrow opening for receiving something, such as a piece of paper or a coin, and also a place or position in a sequence, series, or schedule. Informally, it’s also a job opening. As a verb, to slot is to make a slot in something, to put something into a slot, or to fit someone or something into a schedule…