noun

• (uncountable, rarely countable, computing, Internet) Unsolicited bulk electronic messages.
  "I get far too much spam."
• (uncountable, computing, Internet) Any undesired electronic content automatically generated for commercial purposes.
  "An Act to provide for the control of spam, which is unsolicited commercial communications sent in bulk by electronic mail or by text or multi-media messaging to mobile telephone numbers, and to provide for matters connected therewith."
• (Internet) Excessive, often unwanted and repeated online messages.
• (Internet) Ellipsis of spam account.

verb

• (intransitive, computing, Internet) To send spam (i.e. unsolicited electronic messages.)
  "Transformed by programming ineptitude into a monster of Frankenstein proportions, it broke loose on the night of March 31, 1993 and proceeded to spam news.admin.policy with something on the order of 200 messages in which it attempted, and failed, to cancel its own messages."
• (transitive, computing, Internet) To send spam (i.e. unsolicited electronic messages) to a person or entity.
• (transitive, intransitive, computing, Internet) To send messages repeatedly, often with disruptive effect; to flood.
• (transitive, by extension, computing, video games) To do something rapidly and repeatedly.
  "Stop spamming that special attack!"