DP is for Down Payment
DQ is for Dairy Queen
DR is for Dominican Republic
DS is for Down Shift
DT is for T-Rex 
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DU is for under construction
DV is for deer venison
DW is for Working out
DX is for xylophone
DY is for Dye
DZ is for Demilitarized Zone
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EA is for… EA SPORTS
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EB is for eBay
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EC is for Ectetera
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ED is for giggles
Education
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EE is for the author E. E. Cummings
EF is for @Franz
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EG is for 
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EH is for hippopotomonstrosesquippedaliophobia
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EI is for Éire (Ireland)