IMR meaning in Community ?

A narrative work beginning in medias res (Classical Latin: [ɪn ˈmɛdɪ.aːs ˈreːs], lit. "into the middle of things") opens in the midst of the plot (cf. ab ovo, ab initio). Often, exposition is bypassed and filled in gradually, through dialogue, flashbacks or description of past events. For example, Hamlet begins after the death of Hamlet's father. Characters make reference to King Hamlet's death without the plot's first establishment of said fact. Since the play is about Hamlet and the revenge more so than the motivation, Shakespeare uses in medias res to bypass superfluous exposition.

Works that employ in medias res often later use flashback and nonlinear narrative for exposition to fill in the backstory. In Homer's Odyssey, the reader first learns about Odysseus's journey when he is held captive on Calypso's island. The reader then finds out, in Books IX through XII, that the greater part of Odysseus's journey precedes that moment in the narrative. In Homer's Iliad there are fewer flashbacks, although it opens in the thick of the Trojan War.