meaning certain acts necessitate the involvement of financial exchange rather than being done as a favour. Also used as an excuse for unscrupulous acts of financial gain. Popular with City Boys in London, and Essex
Non-descript excuse someone gives you when they're trying to get out of meeting or spending time with you. Similar to "I have plans". Basically means they're not into you.
Girl: Hey, you're on vacation this week right? Wanna come over and hang out?